Portable fan



FIG. 1 is a front perspective view of a portable fan showing our design.

FIG. 2 is a front elevational view of the portable fan shown in FIG. 1.

FIG. 3 is a rear elevational view of the portable fan shown in FIG. 1.

FIG. 4 is a left side elevational view of the portable fan shown in FIG.1, the right side being a mirror image of the left side view.

FIG. 5 is a greatly enlarged top plan view of the portable fan shownFIG. 1; and,

FIG. 6 is an enlarged bottom plan view of the portable fan shown in FIG.1.

The ornamental design for a portable fan, as shown and described.